// tcl.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net
/************************* Required for every parser *************************/
#ifndef OHCOUNT_TCL_PARSER_H
#define OHCOUNT_TCL_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *TCL_LANG = LANG_TCL;
// the languages entities
const char *tcl_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
TCL_SPACE = 0, TCL_COMMENT, TCL_STRING, TCL_ANY
};
/*****************************************************************************/
%%{
machine tcl;
write data;
include common "common.rl";
# Line counting machine
action tcl_ccallback {
switch(entity) {
case TCL_SPACE:
ls
break;
case TCL_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(TCL_LANG)
break;
case NEWLINE:
std_newline(TCL_LANG)
}
}
tcl_comment =
'#' @comment (
escaped_newline %{ entity = INTERNAL_NL; } %tcl_ccallback
|
ws
|
(nonnewline - ws) @comment
)*;
tcl_string =
'"' @code (
escaped_newline %{ entity = INTERNAL_NL; } %tcl_ccallback
|
ws
|
[^\r\n\f\t "\\] @code
|
'\\' nonnewline @code
)* '"';
tcl_line := |*
spaces ${ entity = TCL_SPACE; } => tcl_ccallback;
tcl_comment;
tcl_string;
newline ${ entity = NEWLINE; } => tcl_ccallback;
^space ${ entity = TCL_ANY; } => tcl_ccallback;
*|;
# Entity machine
action tcl_ecallback {
callback(TCL_LANG, tcl_entities[entity], cint(ts), cint(te), userdata);
}
tcl_comment_entity = '#' (escaped_newline | nonnewline)*;
tcl_entity := |*
space+ ${ entity = TCL_SPACE; } => tcl_ecallback;
tcl_comment_entity ${ entity = TCL_COMMENT; } => tcl_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Tcl code.
*
* @param *buffer The string to parse.
* @param length The length of the string to parse.
* @param count Integer flag specifying whether or not to count lines. If yes,
* uses the Ragel machine optimized for counting. Otherwise uses the Ragel
* machine optimized for returning entity positions.
* @param *callback Callback function. If count is set, callback is called for
* every line of code, comment, or blank with 'lcode', 'lcomment', and
* 'lblank' respectively. Otherwise callback is called for each entity found.
*/
void parse_tcl(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity, int s,
int e, void *udata),
void *userdata
) {
init
%% write init;
cs = (count) ? tcl_en_tcl_line : tcl_en_tcl_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(TCL_LANG) }
}
#endif
/*****************************************************************************/